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Schwander SK, Torres M, Sada E, Carranza C, Ramos E, Tary-Lehmann M, Wallis RS, Sierra J, Rich EA.Schwander SK, et al. Among authors: wallis rs.J Infect Dis. 1998 Nov;178(5):1434-45. doi: 10.1086/314454.J Infect Dis. 1998.PMID: 9780265